If you have tried to login, but the site is just reloading and leaves the login fields blank, this is most likely because your web browser does not accept cookies. It means that your web browser blocks name and password when you are trying to log in.

This is, however, easily remedied: see the pictures below and make the neccesary changes in your web browser accordingly (note that the address shold be dendrogbg.com). This manual is for Internet Explorer